Navegação Ciências Exatas e da Terra por Título
Resultados 2802-2821 de 5964
-
Las imágenes en los textos de física : entre el optimismo y la prudencia
(2004) [Artigo de periódico]Este trabajo se propone discutir acerca de las potencialidades y limitaciones de las imágenes externas en la Enseñanza de la Física a partir de referenciales cognitivos, y formular algunas implicaciones para el uso de ... -
Las opiniones de los profesores de física sobre el concepto de interacción en la enseñanza de la física
(2002) [Artigo de periódico]En este trabajo presentamos el análisis del contenido de entrevistas realizadas a Profesores en ejercicio de la enseñanza de la Física del nivel Polimodal. El propósito de las entrevistas estuvo ligado a indagar la importancia ... -
Las situaciones de una propuesta didáctica sobre la interación gravitatoria
(2005) [Artigo de periódico]Desde hace más de dos décadas la investigación en e nseñanza de la ciencia se viene ocupando de generar estrategias para acortar la bre cha entre los conceptos que construyen los estudiantes y los que los científicos emplean ... -
Latent ion tracks in amorphous silicon
(2013) [Artigo de periódico]We present experimental evidence for the formation of ion tracks in amorphous Si induced by swift heavy-ion irradiation. An underlying core-shell structure consistent with remnants of a high-density liquid structure was ... -
-
La teoría de los modelos mentales de Johnson-Laird y sus principios : una aplicación con modelos mentales de célula en estudiantes del curso de orientación universitaria
(2001) [Artigo de periódico]Previa discusión de la idoneidad como teoría de la mente adecuada explicativamente de la Teoría de los Modelos Mentales de Johnson-Laird, se presenta una investigación relativa a las representaciones mentales de célula de ... -
Late sodic metasomatism evidences in bimodal volcanic rocks of the Acampamento Velho Alloformation, Neoproterozoic III, souther Brazil
(2007) [Artigo de periódico]Um estudo mineralógico de detalhe foi realizado nas rochas vulcânicas da Aloformação Acampamento Velho nos Cerros do Bugio, Perau e Serra de Santa Bárbara (Bacia do Camaquã), sudeste do Brasil. Este evento bimodal é ... -
Late-time interacting cosmologies and the Hubble constant tension
(2022) [Artigo de periódico]In this manuscript we reassess the potential of interacting dark matter–dark energy models in solving the Hubble constant tension. These models have been proposed but also questioned as possible solutions to the H0 problem. ... -
Latex and natural rubber : recent advances for biomedical applications
(2022) [Artigo de periódico]Recently, latex (NRL) and natural rubber (NR) from Hevea brasiliensis have emerged as promising biomaterials from renewable sources for biomedical applications. Although some attempts at commercial applications have been ... -
Lattice dynamics and spin-phonon coupling in CaMn2O4 : a raman study
(2014) [Artigo de periódico]We present polarized Raman spectra of CaMn2O4 (marokite) measured in several exact scattering configurations from oriented single crystals. Most of the 11Ag + 12B1g + 10B2g + 9B3g Raman-allowed modes are identified and ... -
Lattice-gas model of a charge regulated planar surface
(2021) [Artigo de periódico]In this work, we consider a lattice-gas model of charge regulation with electrostatic interactions within the Debye–Hückel level of approximation. In addition to long-range electrostatic interactions, the model incorporates ... -
Lattice model of ionic liquid confined by metal electrodes
(2018) [Artigo de periódico]We study, using Monte Carlo simulations, the density profiles and differential capacitance of ionic liquids confined by metal electrodes. To compute the electrostatic energy, we use the recently developed approach based ... -
Lattice site investigation of F in preamorphized Si
(2007) [Artigo de periódico]The lattice location of F atoms in Si was experimentally studied. Si single crystals were amorphized, implanted with F, and afterwards the amorphous layer was recrystallized. Some of the samples prepared in this way were ... -
Lattice strain distribution resolved by X-ray Braggsurface diffraction in an Si matrix distorted by embedded FeSi2 nanoparticles
(2013) [Artigo de periódico]Out-of-plane and primarily in-plane lattice strain distributions, along the two perpendicular crystallographic directions on the subsurface of a silicon layer with embedded FeSi2 nanoparticles, were analyzed and resolved ... -
La V epistemológica aplicada a algunos enfoques en resolución de problemas
(1999) [Artigo de periódico]This paper includes a technique to apply a simplified Gowin’s Vee as a reference tool to analyse four different trends which are useful for research in Physics problem solving. They are: a) the strategy alternative; b) the ... -
Laves-phase pseudobinaries a(fe1-xbx)2 (a=zr,hf;b=al,si): some structural and magnetic properties
(1991) [Artigo de periódico]The lattice parameters and the saturation magnetization are measured for the series of intermetallic compounds A(Fe,B)2 A = Zr, Hf and B = Si and Al, with concentrations less than 15%. The magnetization measurements and ... -
LC-MS/MS method applied to preclinical pharmacokinetic investigation of olanzapine-loaded lipid-core nanocapsules
(2014) [Artigo de periódico]In spite of different methods reported in the literature to determine olanzapine in biological fluids, all of them used high volumes of plasma. Therefore, the purpose of this paper was to develop an LC-MS/MS method using ... -
Leaching of atrazine in commercial and xerogel formulations in oxisol using bioassay and chromatographic methods
(2015) [Artigo de periódico]Mobility of atrazine in soil has contributed to the detection of levels above the legal limit in surface water and groundwater in Europe and the United States. The use of new formulations can reduce or minimize the impacts ... -
Léa da Cruz Fagundes : uma expert na formação de professores, em tempos de aprendizagem mediada por tecnologias digitais de informação e comunicação
(2020) [Artigo de periódico]Apresenta-se neste texto parte da trajetória de Léa da Cruz Fagundes, professora emérita da Universidade Federal do Rio Grande do Sul e que, ao longo de mais de 60 anos de atuação como professora, gerou um legado em termos ... -
Lean Manufacturing e ergonomia : uma revisão sistemática da literatura
(2017) [Artigo de periódico]No decorrer dos anos as temáticas de lean manufacturing, ergonomia e segurança vem sendo estudadas e integradas para melhorias de processos, porém, muitas vezes os recursos humanos são esquecidos. Desta forma, a presente ...